#include <stdio.h>
#define N 3
int main() {
    char* a = "I love China!";
    char b[20],*p;
    p = b;
    /**
     * 用while
     */
    while (*a != '\0'){
        *p = *a;
        p++;
        a++;
    }
    printf("%s",b);
    return 0;
}